Sharing data between GUIs created using guide..

I have two GUIs , namely 'MaterialProperties' and 'MaterialPropertiesData'.

GUI 'MaterialProperties' has a list box containing a list of materials. eg Steel , concrete , aluminium etc. Also it has a push button named 'Modify Properties'.

What i want is on clicking 'Modify Properties' pushbutton on GUI 'MaterialProperties' , GUI ''MaterialPropertiesData'' will be opened and string of editable text present on it will change to the string of listbox selected material on GUI 'MaterialProperties'.

I have tried too many methods, but haven't got the results.

Thanks all.

[Mohammad Sami]

What are the methods you have tried ?